Hello, I have a problem with the Adblue with my truck (DAF XF105 460PS, 2007 year). When I bought the truck used in Oct. 2011 there was no this problem. It was still about 10l Adblue in the tank, lit orange Adblue signs. I did not refill a few days after this error, then I filled tank, over 1000 km driven Adblue tank indicator was always full, became no less. After a couple of days came an error message ím display < Auspuffsystemdörper und Adblue> I 1st workshop: when error reading = adblue frozen, again error came 2nd mill.